The other day I was accorded a significant example of the way mosquitoes may breed in [unsuspected places in one's home. I keep [several aquariums on my porch stocked with various forms of our local mosqüito-destroying fishes, such as bitterlings, top-minnows and paradise fish. Although there are plenty of mosquitoes about, in spite of screening, it is obvious that they cannot breed in these aquariums—at least, that is what. one would assume. In order to keep the sides of these aqitariums free from green algae, I also keep them stocked with various species of water-snails, which crawl over the glass scraping the algae off with their rasp—or file-like tongues and devouring them, One species, the eared pond-snail known to science as Limnaea auricularia, has the habit of floating on its back at the surface of the water with the flat part of its "foot" spread out on the latter, along which it literally crawls as though it were a solid substance. On the occasion about which I am writing I noticed one of these snails in this position at the surface of the water in one of my I was about to turn away when certain peculiar minute movements of what appeared to be the upturned surface of the snail's "foot" caught my attention and made me look more closely. Imagine my surprise when I discovered that these movements were being made by mosquito larvae wriggling in a viscid fluid in the mouth of the snail's shell, the edges of which were practically flush with the surface of the water. Obviously what had
Text read from the printed page and cleaned; old type leaves the occasional error.